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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
506
When a resistor of resistance R is connected across a cell, the terminal p.d of the cell is reduced to three quarters of its e.m.f. The internal resistance of the cell is expressed as
  • A. R/4
  • B. R/3
  • C. R/2
  • D. 3R/4
  • E. 3R
View Answer & Discuss (7) WAEC 1997
507
A pipe open at both ends, produces a fundamental note. If the velocity of sound in air is V and L the length of the pipe, which of the following expresses the frequency of the note? Neglect end correction
  • A. 2V/L
  • B. V/2L
  • C. V/3L
  • D. V/4L
  • E. V/5L
View Answer & Discuss (2) WAEC 1997
508
Which of the following statements is not correct?
  • A. The pitch of a note depends on the frequency of the vibrating source
  • B. The loudness of a note depends on its intensity
  • C. The velocity of sound in air does not depend on the intensity of the note producing it
  • D. The overtones present in a note determine its quality
  • E. Wind speed effects on the speed of sound in air
View Answer & Discuss (4) WAEC 1997
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
509

A progressive wave has a wavelength of 50cm. calculate the phase difference between two points at a distance of 20cm apart.

  • A. 10/3π
  • B. 5/2 π
  • C. 4/5 π
  • D. 2/3 π
  • E. π/3
View Answer & Discuss (9) WAEC 1997
510

An alternating current with a peak value of 5A passes through a resistor of resistance 10Ω. Calculate the rate at which energy is dissipated in the resistor

  • A. 250W
  • B. 125W
  • C. 50W
  • D. 35.4W
  • E. 12.5W
View Answer & Discuss (6) WAEC 1997
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